Telephone switch-hook.



B. W. SWEET.

TELEPHONE SWITCH HOOK,

APPLICATION FILED s211120, 1909.

Patented May 24, 1910.

YUNITED sTATEs PATENT oEEioE.

BURTON w. SWEET, or CLEVELAND, omo, ASSIGNoE To HARRY z. SANDS, orcLEvE- LAND, oHIo.

TELEPHONE SWITCH-HOOK.

Specification of Letters Patent.

Patented May 24, 1910.

Original application filed April 1, 1907, Serial No. 365,698. Dividedand this application led September 20,

To all whom t may concern:

Be it known that I, BURTON W. SWEET, a citizen of the United States ofAmerica, and a resident of Cleveland, in the county of Cuyahoga andState of Ohio, have invented certain new and useful Improvements inTelephone Switch-Hooks, of which the following is a specification,reference being had as well to the accompanying drawings, forming a partthereof.

My invention relates to improvements in telephone hook switches, and hasfor its object the construction of an appliance of this class, wherebythe supporting switch hook for the receiver may be removably butsecurely mounted in place upon the telephone instrument.

My present application comprises a division of an earlier one filed byme April lst, 1907, Serial No. 365,698, wherein I have described andclaimed a novel form of telephone desk set, to which my switch hook isparticularly applicable.

By reason of the necessity for frequent inspection, and also for thepurpose of safely shipping the same, telephone apparatus preferably isprovided with a switch hook of the removable type, and practicalrequirements demand that this shall be cheap to manufacture, and securewhen mounted in place within the instrument. The switch hook of myinvention conforms to these requirements, and will now be described inconnection with the telephone desk set, with which I originally designedthe same, although it will be obvious that its use is not limitedthereto.

Referring to the accompanying drawings illustrating an embodiment of myinvention-Figure I is a vertical section of the improved desk set,equipped with the novel form of switch hook in question. Fig. II is aview of certain details thereof in side elevation and partially brokenaway. Fig. III is a transverse section on line IIIWIII, Fig. I. Fig. IVis a fragmentary view illus* trating the inner end of the switch hookand connections within the containing box or case; and Fig. Villustrates the switch hook removed from its associated parts.

Throughout the several figures of the drawings, I have employed the samecharacters of reference to indicate similar parts.

Referring first to Fig. II, it will be seen Serial No. 518,480.

that the transmitter head, the upper Section of the casing and itsretaining ring, have been removed from their attachment upon the centralsupporting plate, thus exposing the removable switch-hook, which isshown properly assembled in the vertical sectional view which I shallnow describe in detail.

The central supporting plate a, has outwardly bent lugs a which arefirmly riveted within the cup c and dished portion d of the stampedmetal base Through the two eyelets e e2, which may be formed of metal orinsulating material, extends the conducting cord f whose individualconductors are connected with the switch springs g, insulatingly mountedupon the lower portion of the supporting plate a.

A stiff clock-spring It bears upon the longer or actuated springof thesaid contact springs, which is looped over an insulating sleeve upon thedepending arm 2 of the pivoted bell-crank member of the hook switch. Ahousing 3 secured near the upper end of the supporting plate, pivotallymounts this bell-crank member, which is adapted to accommodate thereceiver-sup port or hook e'.

The inner end of the hook or support is slotted and shoulderedrespectively to engage the cross pins 4 5, while a pin 6 passes withinthe slot within Said pivoted bell-crank member t, and is normally heldby means of the lateral spring 7, which snaps over the head of said pin(see Fig. II). Merely by releasing the spring, however, thereceiver-support or hook z' is readily removed from the upper bell-crankarm, and permits the lower Section y' o-f the casing to be lifted fromits protecting position about the switch springs.

When a switch hook of this type is used in connection with a switchmounted within the ordinary wood boX or casing 7c, as indicated in Fig.IV, it is perfectly obvious that said hook or support may be detachedmerely by actuating the spring 7 out of engagement with the pin 6, sothat the apparatus is better adapted for Shipment or storage, and thecontained switch ,hook parts and switch apparatus are not liable to bedamaged as frequently occurs when the protruding hook is rigidlymounted.

From the foregoing, it will be seen that the switch hook of my inventionis positive in its action, relatively inexpensive and simple andpractical in construction and operation. The features thereof I desireto secure for myself by Letters Patent, substantially as recited in thefollowing claims l. In a telephone switch hook apparatus, thecombination with. a pivoted bell-crank member, of a set of switchsprings connected to be actuated by a depending portion thereof, aremovable supporting member fitting said bell-crank lever, an extendedpin or stud thereon, and a spring adapted to engage the latter andremovably secure the supporting member in place, substantially as setforth.

2. In apparatus of the class described, the combination with a pivotedactuating part, of switch springs connected to be moved into and out ofelectrical engagement thereby, a removable supporting member detachablyfitting said actuating part, and a resilient or spring` actuated detentadapted removably to hold the parts normally in operative relation,substantially as set forth. J

8. In a telephone switch hook appliance, the combination with a set ofswitch springs, of an actuating member pivotally mounted adjacent tosaid springs, a removable receiver support, engaging parts formechanically connecting the two latter elements, a springlilie latch ordetent for normally securing said elements against separation,substantially as set forth.

4. Ina telephone switch hook appliance, the combination with a forwardlyslotted actuating member, of a set of switch springs controlled thereby,a transverse pin pivotally mounting said member, a telephone receiversupport rearwardly slotted to engage said pin, a transverse pin thereonadapted to engage the slotted portion of the actuating member, and aspring latch normally engaging said pin for maintaining the parts inoperative relation, substantially as set forth.

5. In a telephone hook switch for desksets, the combination with acentral mounting plate, of a housing rearwardly secured thereto, anactuating bell-crank member rearwardly pivoted in said housing, a set ofswitch springs positioned beneath and connected to be actuated by saidmember, a removable receiver support fitting the upper arm of the bellcrank member, and a springactuated latch for securing the support andmember together, substantially as set forth.

6. In apparatus of the class described, the combination with a set ofswitch springs, of a bell-crank member pivoted above and adapted toactuate the same into and out of electrical engagement; the samecomprising a depending insulated part and a forwardly slotted upper arm,a rearwardly slotted receiver support fitting said upper arm, a pivotpin mounting said bell-crank member and engaged rearwardly by theslotted support,

a stud upon said support fitting the slotted portion of the bell-crankarm, and a spring normally'engaging said stud to retain the support inplace, substantially as set forth.

In testimony whereof, I have hereunto signed my name at Cleveland, Ohio,this 4th day of August, A. D. 1909, in the presence of two subscribingwitnesses.

BURTON WV. SVEET.

Witnesses ALBERT LYNN LAWRENCE, V. G. ARMSTRONG.

